The objective of this experiment is to design the digital filter using frequency sampling method.
The basic concept of frequency sampling is sampling the desired frequency response Hd (ω) at ω=(2πk/N). Here, the desired frequency response Hd (ω) is ideal filter magnitude which is multiplied by linear phase. The phase response obtained by frequency sampling is same for both LPF and HPF. Ripples are obtained in the stop band of decreasing amplitude.
https://drive.google.com/drive/folders/0ByMxeH1FMa8uNWtsOV8yUkcxYlk
The basic concept of frequency sampling is sampling the desired frequency response Hd (ω) at ω=(2πk/N). Here, the desired frequency response Hd (ω) is ideal filter magnitude which is multiplied by linear phase. The phase response obtained by frequency sampling is same for both LPF and HPF. Ripples are obtained in the stop band of decreasing amplitude.
https://drive.google.com/drive/folders/0ByMxeH1FMa8uNWtsOV8yUkcxYlk
You may revise it once.
ReplyDeletethe frequency samles obtained from frequency sampling are considered as DFT coeefficients
ReplyDeleteThe phase plot is discontinuous between the lobes and also when phase spectrum goes out of range of -pi to pi.
ReplyDeleteFSM is efficient.
ReplyDeleteAs we increase the order of the filter, the frequency response becomes more accurate
ReplyDelete